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'E. E. BARTLETT.

v PUMPING MECHANISM. APPLICATION FILED IAN-24. 191s.

Patented June 10, 1919.

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Earl Z fiarZZeZi, WITNESSES v 1 BY fl z www ATTORNEY.

E. E. BARTLETT.

PUMPING MECHANlSM.

APPLICATION FILED JAN. 24, was.

Patented June 10, 1919.

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WITNESSES INVENTOR.

ATTOR NEY,

E. E. BARTLETT PUMPING MECHANISM;

APPLICATION FILED JAN-24.1918.

1,306,572. Patented June 10, 1919.

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ATTOR N EY EARL E. BARTLETT, OF LOW BUSH, ONTARIO, CANADA...

PUMPING MECHANISM.

Specification of Letters Patent. Patented June 10,1919.

Application filed January 24, 1918. Serial N 0. 213,606.

To all whom it may concern:

Be it known that I, EARL E. BARTLETT, a subject of the King of Great Britain, residing at Low Bush, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Pumping Mechanisms, of which the following is a specification,

My invention relates to improvements in pumping apparatus and the principal object is.to provide a pump in which lost motion is practically-obviated; in which the use of check and other valves is dispensed with, and in which all passageways for the'water orot-her liquid will be relatively large and unimpeded by valves so that'the danger. of clogging will be. reduced to the minimum, and one which will operate smoothly and with slight power.

I particularly aim to provide a pump in which a screw is used to lift the liquid'with the aid ofa traveling barrier or gate device which enters the groove of the screw and prevents return of the liquid to the source of supply.

Additional objects, particularly relative to the details, will become apparent as the description progresses in connection with accompanying drawings, wherein one preferred embodiment is shown and T Figure 1 is a front elevational view;

Fig. 2 is a vertical sectional view through the casing to disclose the interior or working parts;

Fig. 3'is a top or plan view;

Fig. 4c is a bottom view; I

Fig. 5 is a cross sectional view on the line 5-5 of Fig. 2'; V i

Fig. 6 is a detail perspective view of the sprocket wheel which may be used;

Fig. 7 is a fragmentary view of the closure device for the screw looking from the interior of the device; I

Fig. 8 is a detail perspective view of one of the closure devices. and associated parts, and

Fig. 9 is a fragmentary vertical sectional view of the screw chamber looking toward the left of Fig. 2. 7

Referring specifically to the drawings, wherein like reference characters designate like or similar parts,the working mechanism may be mounted in any suitable form of casing; By way of example I show a casing substantially made in two parts. One part comprises a tubular screw or lifting chamber 10 and an open box or chamber 11 for a closure device later to be described. The chamber 11 is closed by a plate 12, preferably by means of bolts 13 extending through the flanges provided as shown, on the chamber 11 and plate 12. I

Chamber 10 is open at the bottom, which is the inlet, and closed at the top by a wall 1%, adjacent which an outlet conduit 15 is provided.

l/Vithin the chamber 10, a screw 16 is disposed, being journaled in a suitable bearing 17 fastened in'any desired manner adjacent the inlet end. of the chamber. Resting on the bearing 17 is a collar 18 and below the bearing 17 at 19 may be threaded to a shank of'the screw. At the top, the shank of the screw extends through the wall 14 which serves as a bearing and beyond the wall has a suitable collar 20 resting thereon above which collar a pulley 21 is provided, preferably being fastened in place by means of a nut 22. Pulley 21 is rigidly secured to the screw and driven as by means of a belt from any approved source of power. "The thread of the screw is spiral as usual and designated 23 and the spiral groove between the threads is designated thereof being of any suitable configuration but preferably bein g'arcuate as shown. Q'Mounted transversely of the chamber 11 and the plate 12, are shafts 25., These shafts at 24," the wall are preferably secured in place by means of nuts'26 bearing against the exterior of the chamber 11 and plate 12 in such a manner that the shafts automatically slide relatively to'the'screw; On shafts 25, sprocket members 27 are journaled,being provided with sprocket teeth or projections at 28. An endless closure or gate device is trained around the sprocket. The wall .of chamber .10 is provided with a slot vertically elongated at 29 intermediate the same and chamber 11, and the closure device travels in said slot. The slot is relatively narrow as will be realized and for the greater portion of its length is'always filled by the closure device. At the top, of chamber 11, a rod 30 is journaled inthe chamber 11 and plate 12 on which a closure 31 is rigidly mounted and normally urged toward the slot to normally close it. EXteriorly of the plate 12, a crank 32 is rigidly connected to rod 30 and to the crank a return spring 33 is fastened, which is also fastened to the plate 12. This spring normally pulls the crank 32 dowi'iwardly to keep the closure over the slot 29 when the working parts of the pump will permit.

The closure device essentially com rises a plurality of equidistantly spaced c os'ure or gate members 32. These gate members 32 are pivotally or flexibly connected together by pairs of links 33 which enter slots 3% provided in the closures so that when the closures and links are joined, the side faces of the device will be flush. Pivots 35 extend through the links 33 and closures .32 and in order to permit the necessary flexing action of the links and closures, the closures are enlarged at 36. It will be noted that by spacing the closures apart and by reason of the fact thatthe links are spaced apart, slots orrecesses 37 are provided between the links and the closures into which the projections 28 extend. The device is quite similar therefore to a chain. 7

At times, it may be desirable to adjust the closure members relatively to the screw and to permit such adjustment, horizontally elongated slots 38 are provided in the cham ber 11 and wall 1'2. The bolts or shafts 25 are mounted in these slots for horizontal adjust'ment, being normally fastened in place by the nuts 26 previously described. However, the adjustment is automaticas the shafts, sprockets and closures normally slide relatively to the screw according to inaccuracies of the fit of the closures in the groove of the screw to overcome the inaccuracies. i

In operation, by means ofa belt, power may be transmitted to the pulley 21 so as to drive or revolve the screw 16 at any desired speed. The screw causes a suction in the chamber 10 thus causing the liquid or water to be pumped or rise i'romthe source of supply through the chamber and out through the conduit 15. As each spiral portion of the groove fills, one of the closures 32 moves into closing relation therewith, thus prevent in g back flow of the water under all conditions. As the screw is turning, and by its turning, moving the closure device, the water gradually rises in thegroove until it reaches the top of chamber 10 whence it will escape to the conduit 15. As previously set forth, the slot 29 is substantially closed at all times by means of the closures and the links 37 so as not to seriously interfere with the vacuum or suction necessary to successful operation. 7 The slot 29 for a short portion must remain open near itsbase, when one of the closures 32 is not traveling therethrough, but this feature does not offer serious objections. At the top, closure 31 is provided to close the top of the slot whenever practical and it will be realized that the closure member covers the upper end of the slot when one of the closures 32 does not engage it. Thus this closure alternately opens and closes under the action of the closures 32 and spring 33.

Since merely the referred embodiment of the invention has been illustrated and described, it is to be understood that changes in the details of construction may be resorted to Without departing from the spirit and scope as defined by appended claims.

I claim 1. A pump comprising a conveyer screw, a chamber in which said screw is disposed, a closure device, a second chamber for the reception of said closure device, the wall of the first named chamber being slotted for the greater part of its length which establishjes communication with the second chamber, said closure device being movable longitudinally through the slot to substantially close the same and extending into the grooves of the screw, and means for propelling the screw. 3

2. A pump comprising a conveyer screw, a chamber in which said screw is disposed, an endless closure device, a second chamber for the reception of said closure device,

idler sprockets mounted in the second chamher for supporting and guiding said cl'osure device, the wall of the iirst named chamber being slotted for the greater part of its length which establishes communication with the second chamber, said closure device being movable longitudinally through the slot to substantially close the same and ex.- tending into the groove of the screw, and means for propelling the screw.

3. Apump comprising a conveyor screw, a chamber in which said screw is disposed, an endless closure device, a second chamber for the reception of said closure device, idler sprockets for supporting and guiding said closure device, means for adjustably mounting said sprockets, the wall of the first named chamber being slotted for the greater part. of its length which establishes communication with the second chamber, said closure device being movable longitudinally through the slot to substantially close the same and extending into the grooves of the screw, and means for propelling the screw. 7

A pump comprising a conveyer screw, a chamber in which said screw is disposed, an endless closure device, a sec-.ndchamber for the reception of said closure device, said closure devicecomprising a plurality of sections provided with link receiving pockets, said sections being spaced from one another, parallel links mounted in said pockets and spaced apart whereby an opening is pro vided between the ends of the sections, and the links, idler sprockets having teeth enter ing the opening between the sections for supporting and guiding said closure device, the wall of the first named chamber beingslotted for the greater part of its length which establishes communication with the second chamber, said closure device being movable longitudinally through the slots to substantially close the same and extending into the grooves of the screw, and means for propelling the screw.

5. A pump having a conveyor screw, a closure device for the groove thereof, the pump also having a,slot in which said closure device moves, a closure member for a portion of the slot, and means to normally urge said closure member against closing relation With the slot.

6. A pump having a conveyer screw, :1. closure device for the groove thereof, the pump having a slot through which said closure device moves, a closure member for a portion of the slot, a return spring connected to said member, and said member being in the path of movement of the device and movable thereby.

7. A pump having a conveyer screw, a chamber therefor, a second chamber, a closure device for the groove of the screw mounted in the second chamber, said device comprising a plurality of closure members disposed in spaced relation, pairs of links 7 copies of this patent may be obtained for joining said members, said members having slots receiving said links, said links being spaced apart and pivoted to the closure members, sprocket wheels, means to mount the sprocket wheels in the second chamber, said device being trained over said sprocket wheels, the pump having a slot intermediate the screw chamber and second chamber, said closure device substantially filling said slot, a closure device for a portion of said slot, a crank carrying said device, a return spring connected to the crank, a bearing for one end of the screw, carried by the screw chamber, said chamber being closed at the top, the closed wall at the top of the screw chamber forming a bearing for the screw, means exteriorly of the chamber and engaging said wall for the application of driving power to the screw, and outlet conduit means for the screw chamber.

In testimony whereof I aflix my signature in presence of two witnesses.

EARL E. BARTLETT.

Witnesses:

VoLIUs BRADLEY, W. S. CARTER.

five cents each, by addressing the Commissioner of Patents, Washington, 13.0. 

